Some mistakes in german language file

[ralf-krause]

https://github.com/microsoft/pxt-neopixel/blob/master/_locales/de/neopixel-strings.json

Makecode does not show the german string
"neopixel.hsl|block": "HSL-Farbe: Farbwert %hue|Sättigung %sat|Helligkeit %lum"
Please delete the part "HSL-Farbe:" so the german string gets
"neopixel.hsl|block": "Farbwert %hue|Sättigung %sat|Helligkeit %lum",

I think that the same problem would be with
"neopixel.HSL.rotateHue|block": "HSL-Farbe: rotiere Farbwert von %hsl| um %offset",
but this programming block does not exist in Makecode anymore.

And also the converter block from hsl to rgb does not exist in Makecode anymore
"neopixel.HSL.toRGB|block": "%hsl|nach RGB",
so the string could be deleted.